Flexible harrow.



F. E. DAVI$ & W. W. GAMEBON.

FLEXIBLE HARROW.

APPLICATION rum) nmzs, 191s.

Patenfied July 15, 1913.

Jaye/i373? UNITED STATES PATN @FFTG FRANK E. DAVIS AND WILLIAM W.CAMERON, OF LA CROSSE, WISCONSIN, ASSIGNOES TO LA CROSSE PLOW (30., OFLA CROSSE, WISCONSIN, A CORPORATION OF WIS- CONSIN.

FLEXIBLE I-IARROW.

Specification of Letters Patent.

Patented July 15,1913.

Application filed February 25, 1913. Serial No. 750,494.

To all whom-it may concern Be it known that we, FRANK E. DAVIS andVVILLIAM W. CAMERON, both residents of La Crosse, in the county of LaCrosse and State of Wisconsin, have invented new and useful Improvementsin Flexible Harrows, of which the following is a full, clear, and exactdescription.

The invention relates to flexible harrows of that type in which thetooth-carrying bars are serially and flexibly connected by links.

The invention designs to provide an improved harrow of this type inwhich the links flexibly connecting the bars may be formed of wroughtmetal or rods and are provided with stops for engaging the toothbars.

A further object of the invention is to provide an improved harrow inwhich the links for connecting the tooth bars are formed of wroughtmetal, and permit the teeth to occupy difierent positions according tothe directions of draft.

Other objects of the invention will be obvious from the constructionhereinafter set forth.

The invention consists in the several novel features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings: Figure l is a perspective of a harrow embodying theinvention. Fig. 2 is a perspective of one of the connections between atooth-bar and a pair of links. Fig. 3 is a side elevation of the same,the tooth being shown in position assumed when the draft is applied tocause the tooth to remain angular relatively to a vertical line. Fig. 4:is a detail perspective of one of the links, Fig. 5 is a perspective ofone of the attaching-clips.

The harrow bars a may be in the form of pipes or tubes and teeth I) aresecured thereto in properly spaced relation in any suitable manner. Theharrow bars are serially connected at their ends by flexible connectionscomprising links 0 and clips (Z. Each clip d is preferably formed of aflat bar bent as at d to form a seat for the tubular bar a which servesto hold the clip against horizontal turning. At each side of the toothedbar, each clip is formed with a transversely extending loop or seat dand d respectively. Each clip (Z is secured to a harrowbar by a nut e onthe screw-threaded shank b of one of the teeth 6, or by an ordinary bolt6 extending through the bar. Each tooth is provided with a suitableshoulder or stop 6 and the shank 7) extends diametrically through thetooth-bar. Each link 0 comprises a longitudinally extending portion 0, atransversely extending pivot portion 0 at one end which is adapted topass through and be held in the loop or seat (Z of one of the clips dand another transversely extending pivot-portion 0 which fits in and isheld in loop or seat (Z of the clip (Z on the next harrowbar of theseries. One end of each link is formed with a curved integral extension0 which is adapted to overlie'and engage one of the harrowbars a and theopposite end of the links is formed with a similar, but oppositelyextending integral portion 0 which is adapted to engage the harrow-bar ato which the pivot c is connected. These integral portions 0* and cextend outwardly and longitudinally from the pivots of the links andserve as stops for limiting the pivotal movement of the harrow-barsrelatively to the links or line of draft, and these stops are relativelydisposed so that the harrow-teeth will remain in vertical position whenthe draft is applied to one end of the harrow and to remain in arearwardly angled position when the draft is applied to the other end ofthe harrow. For example, when the harrow is being operated in thedirection of the arrow (Fig. 1), stops 0 will engage the harrow bars andstop relative pivotal movement between the harrow-bars and the links.When the harrow-teeth are vertical, the S ps 0 at the other end. of thelinks will tion.

then be separated from the bars, and resultantly the harrow-teeth Willbe operated in substantially vertical position, although the pivotalconnections permit the bars to rise and fall relatively to one anotherto accommodate the harrow to irregularities in the ground. When I thedirection of the draft is reversed to that indicated by the arrowzinFig. 3, therearends 0 of links 0 will abut against the harrow-bar whenthe teeth are inclined rearwardly, as shown in Fig. 3 and thus serve asstops for causing the teeth to be operated in an angular posi- At suchtime, the;front ends 0* will be free or separated from the barrow-barand will permit the'limited flexibility desired. Any suit-abledraft-connectlon may be employed forthe front and rear har- 'The linksand the-attaching clips may both be formed of wrought metal or bars, sothat practically the entire structure may be of wrought metal.

The invention is not to be understood. as restricted to the details setforth, since these I may be modified within the scope of the aping thebars to limit relative pivotal movepended claims without departing fromthe spirit and scope of the invention.

Having thus described the invention what we claim as new and desire tosecure by Letters Patent, is:

1. A flexible harrow'comp'rising bars having teeth thereon, and linkspivotally connectedto the bars and formed with stops thereon extended toengage the bars at the opposite ends ofz'the links to limit relativepivotal movement between the links and the bars.

2. A flexible harrow comprising bars having teeth thereon, and linkspivotally connected to the bars at the sides thereof and formed withstops thereon extended to engage thebars at'theopposite ends of thelinks and to limit relative pivotal movement 55 between the links andthe bars.

8. A flexible harrow, comprising bars having teeth thereon, links forflexibly connecting the bars, clips secured to the bars in which thelinks arepivoted, said links beingformed with stops thereon forengagment' between the links and the bars. 4. 'A'flexible harrowcomprising bars hav- 111g teeth "thereon and links pivotally con- :ing'teeth thereon, clips secured to the bars and having a seatat each sidethereof, and

links for connecting the bars having transversely integral extendingportions held in the seats in the clips respectively, and integral stopson the links extended into posi: tion to engage the bars and limitrelative pivotal movement between the links and the bars.

7. A flexible harrow comprising bars having teeth thereon, and linkspivotally con nected to the bars and formed with stops thereon extendedto engage the bars at the opposite ends of the links and to limitrelative pivotal movement between the links and the bars, the stops atthe opposite ends of the links being disposed to permit the teeth toassumd different Working positions according to the direction of draft.

8. A flexible harrow, comprising bars having teeth thereon, links forflexibly connecting the bars, clips secured to the bars in which thelinks are pivoted, said links being formed with stops thereon forengaging the bars to limit relative pivotal movement between thelinksand the bars, the stops at the opposite ends of the links being disposedto permit the teeth to assume different working positions according tothe direction of draft.

9. A flexible harrow comprising bars having teeth thereon and linkspivotally connected to the bars and formed with a stop at their oppositeends extended to overlie the bars respectively, for limiting relativepivotal movement between the links and the bars, the stops at theopposite ends of the links being disposed to permit the teeth to assumedifferent working positions accord- .ing to the direction of draft.

10. 'A flexible harrow comprising bars havingteeth thereon, clipssecured to the barsand havinga seat at each side thereof, and links forconnectmg the bars, having transversely integral extending portions.held in the seats in the clips respectively,

and integral stops on the links extended into posltlon to engage thebars and limit relative pivotal movement between the links and the bars,the stops at the opposite'ends of the l nks being disposed to permit theteeth to assume different Working positions the bar and form stops forlimiting relative accorcllikngzo tile direction of draft. b pivotalmovement of the links and the bars. 10

11. exi le arrow comprising ars FRANK E D AVIS having teeth thereon,clips formed of a flat bar bent to form a loop at each side of theWILLIAM CAMERON bar. links connecting the clips having translVitnesses:

versely extending pivots held in said loops G. F. SUTon,

and having their terminals bent to overlie H. W. ROBINSON.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissioner of Patents,

Washington, I). G.

